Fuel-pump.



G. DAY @L G. E. WINDELER.

FUEL PUMP.

APPLICATION FILED JUNE 13, 1912.

1,'1 15,1 79'; Patented 0013.27, 1914.

vsn 55 clealanee between vbhe phinggers CHARLES DAY AND GEGIELGE 3E. Wll'/Eir' GENERAL @LEUTE-EU GMPE'Y,

T0 all whom 'it may @omer/1L Be it known that We, CHARLES Der enel GEORGE E. WXNDELER, subjects of the e of Greet Brita-in, resiciing at Stoel/ipe.e$ eounty of Cheshire, England, hzwe invent Certain new .and useful improvements Fuel-Pumps, of whielrhe foliewxng is specification.

Qur invention relates te 'ruineN for sun- F .L L plying fuel to high eon'ipression internal combustion oil engines and hire ifer iis el). eel; to improve their` construction anri opere, tion. Pumps of this Class commonly snpply fuel at a pressure greater than the coinpression pressure or the engine; 'iL-his ier example may require 1the pump to deliver uel at a pressure as high es 50() pounds per square meh. Such a pump to he sains nctory 1n service must be Well merle 1n. every particular.

The diiiioulies in making a single plungger pump, while many, are nel; se gir/ar as 1n making multiple plunger pumps. in 'the latter ease great (lilliculfry i enijierieneerl in boi-ine' the e linde/rs anni Qlrilhne 4he cross-- heads with he exact pioh dist-Linee between them, and to so position lhe eyhnrler hores and erossheacl holes 'when assemblee that they are strictly ahnecl. hie nonne it 1s to he borne in mimi. than;

der walls. Ve overcome this reuele arranging the plungers the?, they are alining` or sel'f-eeiiterlnf.;` in ehe erossh or other means which aeruates them.

Another feature of our in'venion is (iirected to a means vfor quickly rendering e i pump inoperative to shut (lon/n the engine in ease of trouble or otherwise.

Other features of our invention will referred to later.

In the accompanying drawing Yis illustrated one of the embodiments of enr invention, Wherein Figure l isn yvertical section of a fein@ cylinder fuel pump; Fig. is e View in front elevation thereof; Fig. 3 a detail View showing the normal means fer aci/nin the suction valve of the pump; Fig. fiis n detail View Showing a means for putting the suction valves out of eperatien7 to shui; down the engine, and Fig. i e perspective vienT of one of the discharge 6 indicates the mein bedy ef ehe pu that is secured by bolts er einer ineens (Y LTI led is fil infr and ohainlu-ir le" The hotoin a removable Le rffteijve er meh eninriers heine saine ver# he sir- ,tly in forni f- @einer :somewhat more e 'wear anni lute size te he ehe 'very ndr; inins i he culi mier guided bythe cylinder Vall, thereby compensatinef foniaulty alinemcnt or machine Work. At this point it is Well to bear in mind that the crosshead also has to he guided in its movements, and that the guides have to he machined and mounted. on the frame 7. Of course the'perts are machined es accurately as possible and are also mount-- ed as accurately es possible, still the opportunitiesfor error are great, due to very exact requirements, and therefore a limited amount or' play between the plunger and the erosshead is or' the utmost' importance. All oit the plungers are similarly con' structed.

'lllhev crosshead may be of any suitable construction provided it is strong and can he Well guided. lt is provided with as many equally space-d holes .there are plungers, the top and bottom, surfaces coperatl ing with the plunger parts being carefully linished. The' back ol the crosshead is enlarged'to form a good support 23, und said support movesvertically in guides 24. The crosshead is also provided with two cheek pieces through which the removable pin 26 extends, said pin' connecting the lower end oit the eccenti'icrod 2'? and the crosshead. for actuating the plungers. rthe pin normally held in place by the pivoted lat-ch QS that enters a small groove 25.? therein. removing the pin 26 sivinging'the eccentric rod Wout oli the Way, and mount in the lever 30;in place shown hy dotted lines with its pin in 'theplace of pin 26, the pump can he actuated hy hand to lill the pipes leading to the pulverizers of the engine and torce out any air which mcy he (a'nitained inpthe'szvstem, utter which the parts are replaced and the engine will loe ready for operation. .lhe crosshead is driven by an eccentric 3l.' that is mounted on the end oi1 the shaft 352. Motion from the eccentric is transmitted. to the cross head hythe rod 127 and the eccentric strap 3S.

lla'ch pump is provided with a suction valve S5 that is located. within. a holder 236 the latter having a conical end which. lits t similarly shaped here in the puni-'p C;

'The holder is held in place hy a holler.Y nut 37. The lower end ol' the holder fin ed internally to torni :L guide for the cap or cover 325 containing the lower end of 'the valve soindle. The cap herdeneifl to re` duce lWear. Between a fixed shoulder on 'the holder` and the top of the cap is a coiled compression spring 39 that tends at all times to move seid cap downward and permit the suction valve to seat. Extending longitudinally. ot the oil containingchainlocr'at the bottom of the pump casing is c shaft 4() having squared portions and ymounted thereon are arms or 4i.,

Fig. 3, each of which has an screw 42 end check nut whereby the timing' oi the.,

Luanne litt of the valve by the governor can be changed. rlhe arms are arranged in pairs on the same hub, as best shown in Fig. 2, and located at opposite ends of the huh are valve litters for putting the pumps out of operation as will he 'iiei'erred t-o later in connection with Fig. 4. The casing is provided with a removable door 43, Fig. l, by means of which access is had to said valve tappets.

The tappet carrying shaft is mounted in suitable removable bearings 44 located in the side Walls of the casing, said shaft also being provided With a suitable stufling box 45 to prevent leakage.- On the left hand end oli-the shaft is mount-ed an erm 46, Figs. 2 and 3 hyv means of Which the shaft is rocked or vihrated With a. constant length or' stroke hy the reciprocation of the pump plungers hut the region of said vibration is changed by the speed governor. To this end the arm 46 is connected by a rod 47 to a lever 48, one end of which is pivotally connected to and vihrated by the crosshead 19. rlf'he other end of the lever is connected'to :t speed governor actuated rod 49. It will therefore be seen that as the cross-head moves .up and down the tappets Will be similarly moved. As .the governor rod moves upor down with achange in speed the position ci the lulcrum of the lever 48 will be changed and hence the region of movement oit the tappe/ts.` .As the fulcrum 50 is moved downward by the speed governor (not shown) the suction valve 35 will close earlier on the discharge stroke y ot the plunger and hence a greater amount of oil will he delivered hy the pump to the pulverizer. 'if the :tulcrumv is moved upward less oil will' he delivered. t is to he undei-stood that so long a's the suction valve is held other its seat the eil displaced. by the plunger will he returned to the supply chamber 8 from which it was received onthe suction stroke. Each pump also inovided jvith two discharge Valves 5l. and 52 arranged in series so as to prethe oil from. returning to the cylin-` der space on the suction stroke. ln some one valve-will suffice vhut the two vulve arrangement 'is better hecause'the lilzelilmodV ot leal-:age is less. The'valves are or muy 'be similar in construction and are hestslnnvn in Fig. 5. 'The valve is holloeed out at 53 to' receive the spring 54, lig. l, and is provided with external guides .ou that have roumlcd faces arranged to fit into the here of the holder 5G for the outer valve.. and the here within the casing G 'for `the inner valve. The upper end of the holder is provided with a nut 57 to limit the n'mvoinent ot the valve and prevent'the escape ot oil. The holder for the upper valve acts as a device to, limit the upward 1uovemcne.olthe 'lower' v el re. The" nut 57 forms apart `ot a. hollow fitting which reion *JMW and. uw forked of the w J up i @asm n blown in, gngml und. mm. thai? LIE-3 @il Musk:

lu n gef:

@visions of the means,

1'@ to se i valve for the eylindei; a spindle journaled 'bustinglshe liifters, and a device for moving 'sioii Valve, said lieis being noifmally idle, and. means for moving them to mise the suotion valves from their seats4 2, ln a fuel pump, the combination of a 'plurality of cylinders, Apluugeis therefor, suction and discharge Valves foi' the. cylindeisJ ytappets for normally controlling the suction valves, a support for the tappets, liteis for the suction Valves loosely liiouned on the support, a, plurality of yiiems for ucall oi.I said means simultaneously.

3. In a fuel pump, the comhiimlsion of a vcasing having a fuel .supply chamber in the bottom., a cylinder in the casing, a plunger in the Cylinder, a suction und :L discharge in the Walls of the chamber, a tappet fixed to the spindle for lifting the suction valve from its seat when the spindle is turned, aliftei' m'm for the suction Valve loosely 'journaled on said spindle, a member pivoted in the 4i. In a. fuel pump, the combiriation .of ai easing having a fuel supply chamber inqigho bottom, a plurality of cylinders in the casing,

plungers therefor, a suction and a discharge valve for each cylinder, a shaft journaled in the casing, tappets fixed to the shaft for normally controlling the suction valves, lifters for the suction Valves loosely pivotecl on said shalt, a second shaft parallel to the first named shaft, and means carried by the salu shaft for 4simultaneously lifting all said lifters. v

In Witness whereof, We have hereunto set oiu' hands this 23rd Clay of May, 1912.

' CHARLES DA Y. f L s.

GEORGE E. WINDELER. [L 8.] Witnesses:

Amex. F. MACDONALD, JoHN W. GILL. 

